Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	Adjustable/Selectable
Voltage - Threshold:	4.5V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Supplier Device Package:	5-SSOP
Base Part Number:	BU43*

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PMIC - Supervisors - BU4345G-TR

The BU4345G-TR is a Voltage Supervisor with chip enable and reset functions that are essential for use in modern integrated circuits (ICs). It is a high-performance power management integrated circuit (PMIC) designed to protect, monitor and control voltage. This article will provide an overview of BU4345G-TR – its application field and working principle.

Application Field

The BU4345G-TR voltage supervisor is a five-pin power management IC designed primarily to protect devices from over-voltage and short-circuit conditions. It is particularly useful in microcontroller-based systems that need to respond quickly to critical voltage situations.The BU4345G-TR is mainly used for two important functions:1) Protection: This device provides a wide range of protection features such as over voltage protection, under voltage protection, and short circuit protection that help protect against any voltage related damage to the system. 2) Reset/chip enable: This supervisor provides reset/chip enable protection that helps the chip to reset itself in the event of unexpected power supply failure or brown-out conditions. This allows the system to be reset or restarted safely without any damage.The BU4345G-TR is an important part of any power management system, as it helps in providing a secure and safe environment for the operation of other devices.

Typical Applications

BU4345G-TR can be effectively deployed on a wide range of applications. This power management IC is commonly used in some of the following applications:- PC motherboards- Embedded control systems - Automotive control systems - Mobile phones - Battery-powered systems

Working Principle

The BU4345G-TR voltage supervisor is designed to help protect ICs and other sensitive electronic components from damage caused by over voltage, under voltage, or short circuit conditions. In the event of any such conditions, this Supervisor will alert the external processor or controller through either reset or chip enable outputs.When the voltage exceeds or drops below a certain threshold, the voltage supervisor will trigger two interrupts. The first interrupt is the reset signal, which forces the system to initiate a reboot and resumes normal operations. The second interrupt is the chip enable signal, which allows the processor or controller to limit or stop certain activities to prevent damage. This signal can also be used to pause or hold the system until normal voltage is restored.The BU4345G-TR also has an internal Softstart circuit, which limits the inrush current during a reset or system restart. It limits the amount of current used until the voltage returns to normal levels, reducing stress on the power supply and ensuring a safe and secure system operation.

Features

The BU4345G-TR voltage supervisor offers several features that make it ideal for a wide range of applications. Some of its main features are:- Wide operating temperature range: -40oC to +85oC- Wide voltage range: +3V to +11V - Over voltage protection - Under voltage protection - Short circuit protection - Soft-start circuit - Reset and chip enable outputs The BU4345G-TR is a highly versatile and reliable power management IC, making it ideal for numerous applications. Its features, combined with its wide operating temperature and voltage range, make it an essential part of any modern day power management system.

Conclusion

The BU4345G-TR voltage supervisor is an indispensable part of any power management system. Equipped with comprehensive protection features, this supervisor helps protect the system from over voltage, under voltage, and short-circuit conditions. It offers reset and chip enable functions that allow the controller to safely and quickly restore normal operations. The BU4345G-TR is a strong, cost-effective voltage supervisor ideal for physical, embedded, and automotive control systems. It has a wide operating range and is capable of protecting sensitive devices from damage caused by unexpected voltage conditions.

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